Move RemoveChars, ReplaceChars, TrimString, and TruncateUTF8ToByteSize to base namespace.

google_apis/gaia/gaia_auth_util.cc

Index: google_apis/gaia/gaia_auth_util.cc
diff --git a/google_apis/gaia/gaia_auth_util.cc b/google_apis/gaia/gaia_auth_util.cc
index a8cad86408c124b1d93e88d5d2825cc5c52b6b10..ca2d66ec3ebd7e516540e849bbacc9c5dbcff9cc 100644
--- a/google_apis/gaia/gaia_auth_util.cc
+++ b/google_apis/gaia/gaia_auth_util.cc
@@ -25,7 +25,7 @@ std::string CanonicalizeEmail(const std::string& email_address) {
   if (parts.size() != 2U)
     NOTREACHED() << "expecting exactly one @, but got " << parts.size();
   else if (parts[1] == kGmailDomain)  // only strip '.' for gmail accounts.
-    RemoveChars(parts[0], ".", &parts[0]);
+    base::RemoveChars(parts[0], ".", &parts[0]);
   std::string new_email = StringToLowerASCII(JoinString(parts, at));
   VLOG(1) << "Canonicalized " << email_address << " to " << new_email;
   return new_email;